I have gained these cute memory stick for my PSP. With a fast read and write speed is suitable this outstanding to use the PSP as a multimedia device and provides this with 4GB also ample storage. Processing and optics are good. Other one is also not used by SanDisk. Unlike the previous speaker, the stick did not shoot at me out of the PSP when you want them ever again remove it. Absolute buy recommendation for all PSP owners.